Two acts from the New Deal that still exist and which did the things you mention are the Social Security Act and the Tennessee Valley Authority.

The Social Security Act made it much less likely that old people would live in poverty -- it gave them pensions. This makes society more just because people who work all their lives are not being left in poverty. It makes the economy more stable because those people will always have money to spend to keep demand for products up.

The TVA built dams for electricity. This helped the economy by bringing cheap power to the area (so companies would locate there). And it made a more equitable society by letting more people have electricity (which lots of people didn't have back then).

New deal refers to the program of economic reforms and development initiates by president Roosevelt in 1933-1935, to lift USA out of the great depression of 1930's and provide relief to people affected by the depression. These measures included introduction of legislation and setting up of agencies to ensure better regulation of financial institutions, provide better financial security to people, and to achieve greater more equitable society. Many of these acts passed by the congress as a part of new deal continue to exist today and continue to provide valuable support for a stable economy and social justice. some of such acts are discussed below.

Securities Act of 1933 also called Truth-in-securities act was introduced to ensure that firms issuing shares provide adequate and accurate information to investors. Also a Securities and Exchange Commission (SEC) was created in 1934 to regulate trading of securities and control unfair stock market practices.

The social security act act of 1935 provided pension for the aged and insurance for the unemployed. It also made provision for payment to disabled, blind and the needy children.